If safety is your primary concern though, stick with just the command line client, which is a Bash script most HN-readers will be able to follow to the letter.

If safety is your primary concern though, stick with just the command line client, which is a Bash script most HN-readers will be able to follow to the letter. It in turn uses GnuPG. The lack of integration then with the rest of the OS is actually a security benefit.